- solve lots of problems with stuck GDB connections, making it impossible to connect...

- solve lots of problems with stuck GDB connections, making it impossible to connect to GDB, handle timeout of acknowledgement, etc.
- "monitor halt/resume" now works correctly
- "monitor sleep 10000" no longer makes the GDB protocol lock up. There is an error message and the protocol recovers nicely afterwards.
- it's now possible to connect to a target which needs a reset before halt works.
- handle failed memory access more gracefully. Connection is now closed instead of OpenOCD quitting.
- *much* improved handling of 2 second timeout on memory read packets. Especially important w/mouseover evaluation of  variables in Eclipse.
- fixed memory leak upon failed memory packet reply.
- 'O' packets w/progress info is no longer sent out randomly.
- faster packet reply code.
- Thanks to Øyvind Harboe for this patch

git-svn-id: svn://svn.berlios.de/openocd/trunk@300 b42882b7-edfa-0310-969c-e2dbd0fdcd60